You can have a bracket installed in the slip to mount the lift on. I think the cost is ~$1K if the marina will allow you to do it. I had a similar situation at my marina and ended up moving to a different slip that was already configured with the bracket.

I am not that far from the launch anyways. I want to sell this to recoup some of the money i spent to have an addition built on my garage to fit my boat. I am sure I could make it work if I had to but we can just trailer and save money on slip rent too!